Characterization of GATA-1+ hemangioblastic cells in the mouse embryo

Tomomasa Yokomizo, Satoru Takahashi, Naomi Mochizuki, Takashi Kuroha, Masatsugu Ema, Asami Wakamatsu, Ritsuko Shimizu, Osamu Ohneda, Motomi Osato, Hitoshi Okada, Toshihisa Komori, Minetaro Ogawa, Shin Ichi Nishikawa, Yoshiaki Ito, Masayuki Yamamoto

Research output: Contribution to journalArticlepeer-review

41 Citations (Scopus)

Abstract

Hemangioblasts are thought to be one of the sources of hematopoietic progenitors, yet little is known about their localization and fate in the mouse embryo. We show here that a subset of cells co-expressing the hematopoietic marker GATA-1 and the endothelial marker VE-cadherin localize on the yolk sac blood islands at embryonic day 7.5. Clonal analysis demonstrated that GATA-1+ cells isolated from E7.0-7.5 embryos include a common precursor for hematopoietic and endothelial cells. Moreover, this precursor possesses primitive and definitive hematopoietic bipotential. By using a transgenic complementation rescue approach, GATA-1+ cell-derived progenitors were selectively restored in Runx1-deficient mice. In the rescued mice, definitive erythropoiesis was recovered but the rescued progenitors did not display multilineage hematopoiesis or intra-aortic hematopoietic clusters. These results provide evidence of the presence of GATA-1+ hemangioblastic cells in the extra-embryonic region and also their functional contribution to hematopoiesis in the embryo.

Original languageEnglish
Pages (from-to)184-196
Number of pages13
JournalEMBO Journal
Volume26
Issue number1
DOIs
Publication statusPublished - 2007 Jan 10
Externally publishedYes

Keywords

  • GATA-1
  • Hemangioblast
  • Rescue
  • Runx1
  • VE-cadherin

ASJC Scopus subject areas

  • Neuroscience(all)
  • Molecular Biology
  • Biochemistry, Genetics and Molecular Biology(all)
  • Immunology and Microbiology(all)

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